This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A208362 #36 Jul 23 2019 08:51:41 %S A208362 11,101,131,151,181,191,313,353,373,383,727,757,787,797,919,929,10301, %T A208362 10501,10601,11311,11411,12421,12721,12821,13331,13831,13931,14341, %U A208362 14741,15451,15551,16061,16361,16561,16661,17471,17971,18181,18481,19391,19891,19991,30103,30203,30403,30703,30803 %N A208362 "2-ply" palindromic primes. %C A208362 From the Ribenboim book: palindromic primes whose base 10 length is a palindromic prime whose base 10 length is NOT a palindromic prime. %D A208362 Paulo Ribenboim, The New Book of Prime Number Records, Springer-Verlag New York Inc., 1996, pages 160-161. %H A208362 Alvin Hoover Belt, <a href="/A208362/b208362.txt">Table of n, a(n) for n = 1..151</a> %e A208362 11 is a palindromic prime of 2 digits, 2 is a palindromic prime of 1 digit, 1 is NOT a palindromic prime. %Y A208362 Cf. A002385, A208361 (base-10 length of these numbers), A208363 (palindromic primes with these as the base 10 lengths). %K A208362 nonn,base %O A208362 1,1 %A A208362 _Alvin Hoover Belt_, Feb 25 2012